1231487396328 has 128 divisors (see below), whose sum is σ = 3738239481600. Its totient is φ = 330538973184.

The previous prime is 1231487396317. The next prime is 1231487396341. The reversal of 1231487396328 is 8236937841321.

It is a super-2 number, since 2×1231487396328² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3235525 + ... + 3596052.

It is an arithmetic number, because the mean of its divisors is an integer number (29204995950).

Almost surely, 2^{1231487396328} is an apocalyptic number.

It is an amenable number.

1231487396328 is an abundant number, since it is smaller than the sum of its proper divisors (2506752085272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231487396328 is a wasteful number, since it uses less digits than its factorization.

1231487396328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6831659 (or 6831655 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 57.

The spelling of 1231487396328 in words is "one trillion, two hundred thirty-one billion, four hundred eighty-seven million, three hundred ninety-six thousand, three hundred twenty-eight".